actually, 1986 mid year change to interal centering. Some 86's have internal centering boxes. Also, 86 was the first year for the front hydrolic mount, but only on turbos. N/A cars still had solid rubber front mounts in 1993.
The inner drivers changed in 1986. They may have changed with the internal centering.
Drain plug removed mid 1989 I believe.

If I recall from my manual, GM stands for Gearbox, Manual, the first # is the series, the second number is the # of forward gears, the third # denotes the different ratio, and the last # denotes the subseries

GregD is the expert on this stuff
on NA car. . .
GM45X 06 is the gearbox from 80 or so through mid 86.
I don't know for sure, but I believe the very early boxes have incompatible syncro rings from other 45x 06 boxes.
GM45x 08 is a 1 year box for the 85 900 turbo. It has an extra bearning on the input shaft I believe. It is basically the same as the gm45x 06

GM45x 10 internal centering, but parts are compatible with 45x 06 and 08
This is similar to a GM55x 02 I believe. The 55x 02 was on the turbo models.

GM45x 12 internal centering large pinion bearing. NA cars 89-90 early boxes have drain plugs. Parts are not compatible with earlier boxes.
I believe these are similar to the GM55x 04 on the turbo models.

GM45x 14 internal centering large pinion bearing revised shift forks?
These are on NA cars 91-93 (94 conv)
I don't know what the corrisponding turbo box p/n is. In fact the turbo gearbox p/n's I listed may be wrong

If you actually have any interest in the SAAB manual gearbox, the manual is still available from the dealer for around $20. There is really no substitute for the book. The front of the book explains all the part numbers, and what application they had. Even if you never plan to rebuild a box, the book is neat to look at.




posted by 67.193....

• Tranny differences once and for all..., Jeff Cunningham, Wed, 14 Nov 2001 14:45:45
  • Tranny Information Page is UP..., Jeff Cunningham, Thu, 15 Nov 2001 10:23:57
  • Plug, SDP, Thu, 15 Nov 2001 06:43:29
    • My '91 900S do not have a plug.(nm), JustinHiFi , Thu, 15 Nov 2001 08:59:10
      • Must have had extra parts laying around for mine. I, SDP, Thu, 15 Nov 2001 13:23:07
  • Re: Tranny differences once and for all..., Yaofeng, Wed, 14 Nov 2001 17:33:08
  • Opening up a can of worms,Aay. >>>>, Anders, Wed, 14 Nov 2001 16:10:39
    • I think Jeff wants to open up a can of whoop a$$, Quinn S. Kurz, Wed, 14 Nov 2001 17:13:39
  • Re: Tranny differences once and for all..., IrieTom , Wed, 14 Nov 2001 15:52:56
  • Re: Tranny differences once and for all..., Aaron Govatos, Wed, 14 Nov 2001 15:28:47 <-- Viewing This Message
    • Let me add to this.........tranny serial #'s to 1985, DougM , Wed, 14 Nov 2001 16:48:39

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